2.2.0.7 false Reconciliation of the U.S. Federal Statutory Income Tax Rate to our Actual Income Tax Rate on Continuing Operations (Detail) 167 - Disclosure - Reconciliation of the U.S. Federal Statutory Income Tax Rate to our Actual Income Tax Rate on Continuing Operations (Detail) true false false false 1 USD false false iso4217_USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 pure Standard http://www.xbrl.org/2003/instance pure 0 shares Standard http://www.xbrl.org/2003/instance shares 0 iso4217_USD_per_shares Divide http://www.xbrl.org/2003/iso4217 USD iso4217 http://www.xbrl.org/2003/instance shares 0 $ false 2 USD false false iso4217_USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 pure Standard http://www.xbrl.org/2003/instance pure 0 shares Standard http://www.xbrl.org/2003/instance shares 0 iso4217_USD_per_shares Divide http://www.xbrl.org/2003/iso4217 USD iso4217 http://www.xbrl.org/2003/instance shares 0 $ false 3 USD false false iso4217_USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 shares Standard http://www.xbrl.org/2003/instance shares 0 iso4217_USD_per_shares Divide http://www.xbrl.org/2003/iso4217 USD iso4217 http://www.xbrl.org/2003/instance shares 0 pure Standard http://www.xbrl.org/2003/instance pure 0 $ 5 3 us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate us-gaap true na duration No definition available. false false false false false false false false false false false false 1 false true false false 0.350 0.350 false false false 2 false true false false 0.350 0.350 false false false 3 false true false false 0.350 0.350 false false false us-types:percentItemType pure The domestic federal statutory tax rate applicable under enacted tax laws to the Company's pretax income from continuing operations for the period. The "statutory" tax rate shall be the regular tax rate if there are alternative tax systems. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 47 false 6 3 us-gaap_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential us-gaap true na duration No definition available. false false false false false false false false false false false false 1 false true false false -0.075 -0.075 false false false 2 false true false false -0.071 -0.071 false false false 3 false true false false -0.068 -0.068 false false false us-types:percentItemType pure The portion of the difference between the effective income tax rate and domestic federal statutory income tax rate that can be explained by the difference between statutory income tax rates in foreign jurisdictions and the domestic federal statutory income tax rate recorded during the period. No authoritative reference available. false 7 3 us-gaap_EffectiveIncomeTaxRateReconciliationTaxContingenciesOther us-gaap true na duration No definition available. false false false false false false false false false false false false 1 false true false false -0.004 -0.004 false false false 2 false true false false -0.013 -0.013 false false false 3 false true false false -0.034 -0.034 false false false us-types:percentItemType pure The portion of the difference between the effective income tax rate and domestic federal statutory income tax rate attributable to changes in other income tax contingencies, whether recorded or adjusted, during the period not otherwise listed in the existing taxonomy. No authoritative reference available. false 8 3 us-gaap_EffectiveIncomeTaxRateReconciliationDeductionsMedicarePrescriptionDrugBenefit us-gaap true na duration No definition available. false false false false false false false false false false false false 1 false true false false 0.010 0.010 false false false 2 false true false false 0.000 0.000 false false false 3 false true false false 0.000 0.000 false false false us-types:percentItemType pure The portion of the difference between the effective income tax rate and domestic federal statutory income tax rate attributable to the deduction received under enacted tax laws for Medicare prescription drug benefits. No authoritative reference available. false 9 3 us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments us-gaap true na duration No definition available. false false false false false false false false false false false verboselabel false 1 false true false false -0.008 -0.008 false false false 2 false true false false -0.007 -0.007 false false false 3 false true false false -0.007 -0.007 false false false us-types:percentItemType pure The portion of the difference between the effective income tax rate and domestic federal statutory income tax rate attributable to all other items not otherwise listed in the existing taxonomy. No authoritative reference available. false 10 3 us-gaap_EffectiveIncomeTaxRateContinuingOperations us-gaap true na duration No definition available. false false false false false false false false false false false totallabel false 1 false true false false 0.273 0.273 false false false 2 false true false false 0.259 0.259 false false false 3 false true false false 0.241 0.241 false false false us-types:percentItemType pure A ratio calculated by dividing the reported amount of income tax expense attributable to continuing operations for the period by GAAP-basis pretax income from continuing operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 47 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph h -Subparagraph 2 -Article 4 true 3 6 false UnKnown UnKnown UnKnown false true